Exp:A Sapwood decay faster and sapwood is less durable because it is susceptible to attack by pathogen and insects. It is physiologically active and conducting of water takes place through it. Heartwood is not attacked by pathogens and insects as it is physiologically inactive. It is filled with tennis, resins and gums which are not preferred by insects and pathogens.
AIPMT-1993
Anatomy of Flowering Plants
271893
Tyloses are found in
1 Secondary xylem
2 Secondary phloem
3 Sclerenchyma fibres
4 Sclereids
Explanation:
Exp:A Tyloses are found in secondary xylem. These are common in xylem vessels of many genus of angiosperm including Rhus, Robinia, Morus, Sassafras but they never occurs in many genera. Tylose often block water transport in vessels and cause injury by dehydration.
Karnataka CET-2010
Anatomy of Flowering Plants
271894
Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in
1 Periderm
2 heart wood
3 sap wood
4 secondary cortex
Explanation:
Exp:B In woody plant like heartwood, an extension of parenchymatous cell into the lumen of vessels is observed, this is called as Tyloses. When there is any injury or infection, the cavity is blocked by Tyloses so that no further damage or destruction.
Exp:A Sapwood decay faster and sapwood is less durable because it is susceptible to attack by pathogen and insects. It is physiologically active and conducting of water takes place through it. Heartwood is not attacked by pathogens and insects as it is physiologically inactive. It is filled with tennis, resins and gums which are not preferred by insects and pathogens.
AIPMT-1993
Anatomy of Flowering Plants
271893
Tyloses are found in
1 Secondary xylem
2 Secondary phloem
3 Sclerenchyma fibres
4 Sclereids
Explanation:
Exp:A Tyloses are found in secondary xylem. These are common in xylem vessels of many genus of angiosperm including Rhus, Robinia, Morus, Sassafras but they never occurs in many genera. Tylose often block water transport in vessels and cause injury by dehydration.
Karnataka CET-2010
Anatomy of Flowering Plants
271894
Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in
1 Periderm
2 heart wood
3 sap wood
4 secondary cortex
Explanation:
Exp:B In woody plant like heartwood, an extension of parenchymatous cell into the lumen of vessels is observed, this is called as Tyloses. When there is any injury or infection, the cavity is blocked by Tyloses so that no further damage or destruction.
Exp:A Sapwood decay faster and sapwood is less durable because it is susceptible to attack by pathogen and insects. It is physiologically active and conducting of water takes place through it. Heartwood is not attacked by pathogens and insects as it is physiologically inactive. It is filled with tennis, resins and gums which are not preferred by insects and pathogens.
AIPMT-1993
Anatomy of Flowering Plants
271893
Tyloses are found in
1 Secondary xylem
2 Secondary phloem
3 Sclerenchyma fibres
4 Sclereids
Explanation:
Exp:A Tyloses are found in secondary xylem. These are common in xylem vessels of many genus of angiosperm including Rhus, Robinia, Morus, Sassafras but they never occurs in many genera. Tylose often block water transport in vessels and cause injury by dehydration.
Karnataka CET-2010
Anatomy of Flowering Plants
271894
Tyloses an outgrowth from ray or axial parenchyma cell into the lumen of a vessel, which partially or completely blocks the cavity are present in
1 Periderm
2 heart wood
3 sap wood
4 secondary cortex
Explanation:
Exp:B In woody plant like heartwood, an extension of parenchymatous cell into the lumen of vessels is observed, this is called as Tyloses. When there is any injury or infection, the cavity is blocked by Tyloses so that no further damage or destruction.
